Installed new RAM and now got System Failure: cpu=0 error

This is so frustrating! I installed a 1 GB RAM chip (4200) in addition to the original 512 RAM. I turned on the computer, everything started and was working. I went in to the System Profiler and it was showing RAM as ok, but it had this: (Reversed) <-- in the name. I thought it was odd, but it was at least showing up. I quit iCal and I got a screen full of code with errors - the one I kept seeing was a kernel error. There was also a message that I needed to restart. I did - then it would not come on (fan was running, no video). So I shut down, took out the RAM, put it back in and let it sit for a few hours. When I turned it back on, it started up and I was able to log in to Gmail and created a message reply. In the middle of typing, I got an error that starts out with "System Failure: cpu=0; code=000000004 (No saveareas)" There's a lot more (about 1/3 of my screen) and the last line says "Waiting for remote debugger connection." I live about an hour and a half from a Mac store, so if I have to get there, I can....but does this mean I have a bad RAM chip or just a bad computer?

Odds are that it's a bad RAM module. People report many problems even with RAM modules that supposedly meet the printed specs. This is why a vendor that will easily replace modules is helpful.
Go back to the original 512MB only and see if the computer at least works. You might also try swapping sockets. It's possible you may have exacerbated the dead RAM socket problem, or even just have lint or dust in the sockets.

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